There is no "right" way to play in a matched party. Duty Finder just throws three warm bodies to you. You playstyle and goals may not align - this is the price for the convenience of just clicking "queue".

Or... You can take your own advice and just make a PF party where you are free to state whatever goal you deem neccessary and get players who are on the same page as you. And boy, floor 21-30 intuitions? There is like nothing in those sacks.